Exercise device



FIG. 1 is a perspective view of an exercise device;

FIG. 2 is a front elevational view of the exercise device of FIG. 1;

FIG. 3 is a right side elevational view of the exercise device of FIG. 1;

FIG. 4 is a back elevational view of the exercise device of FIG. 1;

FIG. 5 is a top plan view of the exercise device of FIG. 1; and,

FIG. 6 is a bottom plan view of the exercise device of FIG. 1. 

The ornamental design for an exercise device, as shown and described. 